You guys are talking about something that cannot be influenced.
There's a reason -- or several reasons -- most of the world thinks 9/11 was an inside job, and you know what? It's not because of Michael Ruppert, Loose Change or any other 9/11 truth activists! It's because the events were suspicious in themselves, the Bush regime is obviously composed of secret-service gangsters, the events were used as a Reichstag fire, the way the towers fell looked funny to a lot of people, etc.
Given that, first, you can't affect what national leaders are going to say about it. Second, it's predictable that the designated Hitlers of the New War crusade are likeliest to speak up and try to make some hay out of it.
It's also predictable that, unless they've got their own intelligence (which I doubt for Castro or Chavez), or unless they research things really well, they are going to pull what they say from whatever the most popular ideas are (which is where the U.S. 9/11 truth movement, such as it is currently is, is going to have its influence). Castro and Chavez have demonstrated this by going with Pentagon hole and Jimmy Walter, respectively. I like both of them a lot better than Ahmadinejad - yeah, I'm an old commie - but on 9/11 they're as naive as the LC fans.
Given all that: it's Ahmadinejad who's likeliest to have good intel of his own, A. who has the highest stakes in the game, and A. who has taken the cleverest tack with regard to 9/11 so far. It's our tough luck that he's also an Islamist fundamentalist, a mystic, and a provocateur with regard to the Nazi holocaust.
But perhaps the latter is why Bush gave him an assist in becoming president of Iran.